/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.miit.elearning.vtutor.servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import ru.miit.elearning.vtutor.check.ZOSCheckServiceClient;
import ru.miit.elearning.vtutor.data.DataMiner;
import ru.miit.elearning.vtutor.wsclient.curriculum.VlLab;

/**
 *
 * @author Cyclone
 */
public class DataSyncServlet extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");

        DataMiner miner = null;

        try {

            int courseId = Integer.parseInt(request.getParameter("courseId"));
            List<VlLab> vlLabList = ZOSCheckServiceClient.getLabsByCourse(courseId);

            miner = new DataMiner();
            List<Integer> labNumberList = miner.getLabNumbersByCourse(courseId);

            if (request.getParameter("enrichSync") != null) {
                PrintWriter out = response.getWriter();
                if(vlLabList.size() == labNumberList.size()) {
                    out.print("0"); // ok
                }  else {
                    out.print("1");
                }
                out.close();
                return;
            }

            List<Integer> toAdd = new ArrayList<Integer>();
            for (VlLab vlLab : vlLabList) {
                if (!labNumberList.contains(vlLab.getNumeral())) {
                    toAdd.add(vlLab.getNumeral());
                }
            }


//            List<Integer> toDelete = new ArrayList<Integer>();
//            for (Integer number : labNumberList) {
//                boolean contains = false;
//                for(VlLab vlLab : vlLabList) {
//                    if(number.equals(vlLab.getNumeral())) {
//                        contains = true;
//                        break;
//                    }
//                }
//                if(!contains) {
//                    toDelete.add(number);
//                }
//            }



            request.setAttribute("courseId", courseId);

            request.setAttribute("vtLabList", labNumberList);
            request.setAttribute("vlLabList", vlLabList);

            request.setAttribute("toAddList", toAdd);
//            request.setAttribute("toDeleteList", toDelete);

            getServletContext().getRequestDispatcher("/datasync.jsp").forward(request, response);

        } catch (Exception e) {
            Logger.getLogger(DataSyncServlet.class.getName()).log(Level.SEVERE, null, e);
            e.printStackTrace();
        } finally {
            if (miner != null) {
                miner.close();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
